Mbongo Tchobi, also known, as bongo is an earthy spicy black tomato based sauce with smooth, thick, and velvety texture. It’s distinctive taste and color is achieved by burning “hiomi” (Mbongo stick) over hot open flame.
If using catfish ,pour hot water over the fish in the sink, let it sit for a minute, then rinse and clean the fish (this removes all the sliminess of the fish). Skip this if you using any other white fish. Set aside
Lightly fry njansa for about 5 minutes. Set aside.
Chop the tomatoes, onions, green onions and place in a food processor or blender- add njansa, garlic, basil, parsley with a little bit of water if using a blender to facilitate blending. Blend until puree.
Heat up a saucepan with oil, then add the tomatoes mixture, with very little water, bring to a boil and simmer for about 10 minutes stirring occasionally.
Add mbongo spice, fish, Maggi and salt to the mixture; simmer for another 10 minutes or more until fish is cooked through. Add water as necessary to prevent burns.